* Introducing substr wrapper function

* Wire strips tags (Closes #1045)

git-svn-id: https://code.elgg.org/elgg/trunk@3323 36083f99-b078-4883-b0ff-0f9b5a30f544

1 files changed, 18 insertions, 0 deletions

diff --git a/engine/lib/mb_wrapper.php b/engine/lib/mb_wrapper.php
index 7b3327edc..411a2d5c2 100644
--- a/engine/lib/mb_wrapper.php
+++ b/engine/lib/mb_wrapper.php
@@ -42,5 +42,23 @@
 		return strtoupper($string);
 	}
 	
+	/**
+	 * Wrapper function: Returns the result of mb_substr if mb_support is present, else the 
+	 * result of substr is returned.
+	 *
+	 * @param string $string The string.
+	 * @param int $start Start position.
+	 * @param int $length Length.
+	 * @param string $charset The charset (if multibyte support is present) : default 'UTF8'
+	 * @return string
+	 */
+	function elgg_substr($string, $start = 0, $length = null, $charset = 'UTF8')
+	{
+		if (is_callable('mb_substr'))
+			return mb_substr($string, $start, $length, $charset);
+		
+		return substr($string, $start, $length);
+	}
+	
 	// TODO: Other wrapper functions
 ?>
\ No newline at end of file